internal(Docs): Add script to detect broken links in the charts repository)

[monica-m-ps]

What this PR does / why we need it:

This PR detects broken links to docs.sysdig.com.

Checklist

• Title of the PR starts with type and scope, (e.g. feat(agent,node-analyzer,sysdig-deploy):)
• Chart Version bumped for the respective charts
• Variables are documented in the README.md (or README.tpl in some charts)
• Check GithubAction checks (like lint) to avoid merge-check stoppers
• All test files are added in the tests folder of their respective chart and have a "_test" suffix

[francesco-furlan]

I would add also a github action (and a new required check) that runs for each PR and check if there are any broken links in the changed files.
@mavimo @aroberts87 WDYT?

[francesco-furlan]

LGTM
I synced with @mavimo and as a first step this will be a manual operation, and once we have enough confidence it will be ported to CI

[monica-m-ps]

Hey @francesco-furlan yes that's right. I have added it to the UI repo as well. Once I'm confident, I'll ask for help to add it to the ci/cd pipeline. :)